TiO is a molecule of considerable astronomical importance. It is present in the atmospheres of oxygen-rich lowmass stellar objects. Three Fourier transform emission spectra have been used to determine improved and consistent spectroscopic constants of the a1∆, b1Π, d1Σ +, c1Φ and f1∆ states of TiO by fitting the b1Π-a1∆, b1Π- d1Σ +, c1Φ-a1∆ and f1∆-a1∆ systems. This analysis provides the most extensive fit of the TiO singlet states. New bands of the b1Π-a1∆ and c1Φ-a1∆ systems have been measured and an extensive list of line positions will be published.
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